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Method for evaluating flocculation reaction rate and activation energy of white carbon black in sizing material

A technology of flocculation reaction and evaluation method, which is applied in the direction of analysis, analysis of materials, and material inspection products by causing chemical reactions to occur in materials, and can solve problems such as lack of in-depth research.

Active Publication Date: 2021-04-27
ZHONGCE RUBBER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the patent CN107478781B, although a method to characterize the degree of reaction between the two is introduced, there is no in-depth study on the flocculation phenomenon of silica in the later stage

Method used

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  • Method for evaluating flocculation reaction rate and activation energy of white carbon black in sizing material
  • Method for evaluating flocculation reaction rate and activation energy of white carbon black in sizing material
  • Method for evaluating flocculation reaction rate and activation energy of white carbon black in sizing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Evaluate and calculate the flocculation activation energy of silica reinforced rubber prepared by different formulations and different mixing processes.

[0034] Scheme 1~6, the formula of comparative example 1 and mixing process are as described in table 1:

[0035] Table 1

[0036] Recipe (number of servings phr) plan 1 Scenario 2 Option 3 Option 4 Option 5 Comparative example 1 Comparative example 2 Solution Polystyrene Butadiene Rubber 75 75 75 75 75 75 75 cis-butadiene rubber 25 25 25 25 25 25 25 Silica 1165MP 80 80 80 80 80 0 0 carbon black 0 0 0 0 0 80 80 Silane coupling agent Si69 6.4 6.4 6.4 6.4 6.4 6.4 0 Silane coupling agent Si75 0 0 0 0 0 0 6.4 softening oil 32.5 32.5 32.5 32.5 32.5 32.5 32.5 other 10.7 10.7 10.7 10.7 10.7 10.7 10.7 total number of copies 229.6 229.6 229.6 229.6 229.6 229.6 229.6 Silanization holding temperat...

Embodiment 2

[0070] Example 2 evaluates and calculates the flocculation activation energy of silica with different specific surface areas in the same formula.

[0071] Generally speaking, the smaller the particle size of silica, the greater its surface energy and the faster the aggregation rate. Example 2 evaluates the flocculation activation energy of silica with different specific surface areas.

[0072] Among them, the surface area of ​​silica is measured by CTAB method, and the selected silica and the corresponding specific surface area are: 1165MP, CTAB value is 170; 1115MP, CTAB value is 120; 200MP, CTAB value is 200. These three types of silica are all products of Solvay.

[0073] The formulation and silylation reaction conditions used in Example 2 are shown in Table 3. All the other processes in the mixing process are the same as in Example 1.

[0074] table 3

[0075] Recipe (number of servings phr) plan 1 Option 6 Option 7 Solution Polystyrene Butadiene Ru...

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Abstract

The invention belongs to the field of application of rubber industries such as tires, products and the like, and relates to a flocculation phenomenon of a white carbon black reinforced rubber material in processing processes such as extrusion, vulcanization and the like, and a calculation method of a reaction rate and activation energy of the flocculation phenomenon. The invention relates to a method for evaluating flocculation reaction rate and activation energy of white carbon black in a rubber material. The method comprises the following steps of firstly, testing time scanning of the rubber material in a rubber processing analyzer at a certain specific high temperature to obtain modulus change; calculating the flocculation rate of the white carbon black at the temperature according to the modulus change; and finally, measuring the flocculation rates of more than two temperatures, and calculating the flocculation activation energy of the white carbon black according to an Arrhenius equation. The evaluation method is rapid, convenient, high in reproducibility, accurate in judgment and wide in application.

Description

technical field [0001] The invention belongs to the application field of rubber industries such as tires and products, and relates to the flocculation phenomenon that occurs during extrusion, vulcanization, and other processing processes of white carbon black reinforcing rubber materials, and a calculation method for the reaction rate and activation energy of the phenomenon. Background technique [0002] In the tire industry, the main reinforcing materials for rubber are carbon black and white carbon black. Due to its lipophilicity, carbon black has good compatibility with olefin rubber, such as natural rubber, styrene-butadiene rubber, and butadiene rubber. strength and elongation at break. [0003] Compared with traditional carbon black, silica is widely used in the field of tires due to its unique low rolling resistance and high wet grip. However, because silica is hydrophilic, it has poor compatibility with olefin rubber, and it is difficult to disperse in rubber. Eve...

Claims

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Application Information

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IPC IPC(8): G01N33/44G01N21/82C08L9/06C08L9/00C08K7/26C08K5/548
CPCG01N33/445G01N21/82C08L9/06G01N2021/825C08L2205/03C08L2205/02C08L9/00C08K7/26C08K5/548
Inventor 王丹灵陆晓祺郦坚陈生
Owner ZHONGCE RUBBER GRP CO LTD